This helmet lock is rust resistant and designed for long-term reuse. Featuring a mechanical structure design, the code lock provides high security. Constructed with steel wire and ABS material, this product is solid and durable. The product measures 7cm in length and 5.8cm in width. The cable lock is suitable for securing luggage, helmets, bikes, work equipment, briefcases, purses, doors, gates, and various other items. Item Name: Helmet Lock Material: ABS, Steel Wire Features: Solid, High Precision, Rust Resistant Size Details: Size: 7cm x 5.8cm / 2.76" x 2.28" (Approx.) Notes: Instructions for Use 1. Please change your password before using. (The factory password is 0-0-0) 2. When changing the password, retract the cable (A) and press the cable head (B) down, turn the code wheel (C) to the desired number, then pull the cable head (B) out. Remember the password you set. 3. The cable switch (E) controls the cable movement. Pressing the cable switch allows the cable to be extended or retracted, enabling adjustment to the needed length. 4. When locking, align the correct code, insert the cable head into the lock hole, and press until a click is heard. The lock is now secured. 5. When unlocking, enter the correct password, press the unlock switch (D), pull the cable head out of the lock hole, then press the cable switch to retract the cable into the lock body. 6. Children should use this product under adult supervision. Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional differences may occur due to manual measurement. Package Includes: 1 x Helmet Lock